True blue. Owens Corning TruDefinition® DURATION® shingles with patented SureNail® Technology. This North Padre Island home is ready for the next big storm with its new HAND NAILED roof in the color blend Harbor Blue. The roofing system included Owens Corning Starter Shingles, ProArmor® synthetic underlayment, WeatherLock® barrier, RIZERidge® Hip and Ridge shingles, and VentSure® ridge vents. This integrated system of roofing components and layers provides the Total Protection Roofing System that give you the assurance of a long lasting and performing roof.